Nut-lock.



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NUT LOOK.

APPLICATION FILED AUG. 7, 1911.

Patented Aug. 20, 1912.

STATES PATENT orrron.

MARTIN F. PANE, OF CHICAGO, ILLINOIS.

NUT-LOCK.

To all whom it may concern Be it known that I, MARTIN F. PANE, citizenof the United States, residing at Chicago, in the county of Cook andState of Illinois, have invented certain new and useful Improvements inNut-Locks, of which the following is a specification.

This invention has relation to nut locks,

. and has for its object to provide upon a nut means for positively andsecurely engaging a bolt of peculiar configuration, whereby thenut willbe positively locked upon the boltand cannot be detached from the samewithout mutilating or destroying some of the parts of the device.

With this object in view, the bolt is provided at one end with a head ofany desired pattern and is slightly tapered at its other end. Thethreaded portion of the bolt is provided with a series of longitudinallydisposed slots. The nut is provided with the usual threaded openingadapted to engage the thread on the bolt and is provided with a shoulderin which is secured a spring member of peculiar configuration and whichis adapted to enter at its free end one of the grooves upon the bolt. Anabutment is provided upon the nut and a locking member is adapted to beinserted between the abutment and the free end portion of the springwhereby the spring is positively held in engagement with the groove inthe bolt.

In the accompanying drawing: Figure 1 is a perspective view of the boltand nut lock; Fig. 2 is an end view of the same; Fig. 3 is a perspectiveview of the parts separated.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the accompanying drawingby the same reference characters.

The bolt 1 is provided at one end with a head 2 and at its other endwith a tapered extremity 3. The intermediate portion of the bolt 1 isthreaded as at 4: and this portion is provided with several (preferably3) longitudinally disposed peripheral grooves 55.

The nut 6 which is used in conjunction with the bolt as hereinbeforedescribed is provided with the usual. threaded opening 7 adapted toengage the bolt 1. A shoulder S is formed at the outer face of the nut 6and is provided with an aperture 9 which extends through from one sideto the other Specification of Letters Patent.

Application filed August 7, 1911.

Patented Aug. 20, 1912.

Serial No. 642,630.

of the said shoulder and which is disposed transversely with relation tothe opening 7 in the nut. A flat spring 10 is provided at one end with areduced shank 11 which is passed through the aperture 9 and the outerextremity of the said shank is bent down against the outer edge of theshoulder 8 as at 12. Shoulders 13 formed at the inner end of the shank 9bear against the opposite edge of the shoulder 8 from that edge againstwhich the extremity 12 bears. The inner portion of the spring 10 iscurved downwardly and the inner corner of the spring 10 is rounded orcut away as at 141. The inner portion of the spring 10 is pro-. videdwith an opening 15. ,An abutment 16 is formed upon the outer face of thenut 6 and is provided with an opening 17. The abutment 16 is located atthe opposite side of the opening 7 in the nut 6 from the shoulder 8hereinbefore described.

A locking device is provided in conjunction with the parts hereinbeforedescribed and said device consists of a bar 18 having shoulders 19 andreduced extremities 20.

To look the nut upon the bolt the following operation is carried out:The bolt 1 is passed through the object or objects that support the sameand the nut 6 is screw threaded upon the outer edge portion of thethread 4 in the usual manner. When the rounded corner portion 14 of thespring 10 engages the tapered end 3 of the bolt 1 the free end portionof the spring 10 is moved away from the axis of the bolt 1. Also thesaid rounded portion 14 serves as means for lifting the free end of thespring 10 over the thread 4 of the said bolt 1. "When the nut has beenscrewed upon the bolt as tight as desired the free end portion of thespring 10 will lie in one of the grooves 5 and inasmuch as the spring 10is held by the shoulders 13 and the extremity 12 against longitudinalmovement in the shoulder S, the nut 6 cannot turn reversely or unscrewfrom the bolt. As soon as the free end of the spring 10 is lifted abovethe edges of the grooves 5 the said nut 6 may be readily unscrewed fromthe bolt.

To look the nut 6 in position upon the bolt 1, one of the reduced ends20 of the bar 18 is inserted in the opening 17 provided in the abutment16 and the other extremity 20 of the said bar is placed just above theopening 15 in the spring 10. A blow is then struck upon the intermediateportion of the bar 18 and as one of the shoulders 19 bears against theinner face of the abutment 16 the said bar cannotmove toward theabutment, but that end thereof which is against the spring 10 will flexthe intermediate portion of the said spring inwardly or downwardly,whereby the end portion 20 which is in. contact with the spring will flyinto the opening 15 provided in the said spring. As the intermediateportion of the spring 10 attempts. to assume its normal position the bar18 is bound in position between the abutment l6 and the said spring andconsequently the said spring cannot be lifted out of engagement with thegroove in the nut until the said bar has been mutilated or destroyed andremoved.

Having thus described the invention, what is claimed as new is:

1. In combination with a bolt having a longitudinally disposed groove, anut adapted to screw thereon and having a shoulder, a spring carried bythe shoulder and having a free end portion adapted to enter the groovein the bolt, said nut also having an abutment, the spring and theabutment being provided with openings, and a locking bar having reducedends adapted to be sprung in posit-ion in the openings in the abutmentand said spring. 7 2. In combination with a bolt having a longitudinallydisposed groove, a nut adapted to screw thereon and having a shoulderprovided with an aperture, a spring passing through said aperture andhaving at its opposite edges shoulders which bear against the edge ofthe first mentioned shoulder, said spring having a downturned end lyingagainst the opposite edge of the first mentioned shoulder, saidnuthaving 1 an abutment spaced from the shoulder mounted upon the nut, anda bar adapted to be interposed between said abutment and the free endportion of the spring to hold the same in engagement with the groove inthe bolt.

' In testimony whereof, I afliX my signature in presence of twowitnesses.

MARTIN F. PANE.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G.

